More bright Ideas it says, well I think a bright idea would be to turn off the lights at 3:16am on a Sunday morning and save us all from more light polution.

Most of the time I've always walked around Zone 1 as its the quickest way to get around central london, you don't have to queue up, get delayed and sqash onto a packed train. well someone has come up with a map showing how long it takes to walk between tube stops, you can see the map here

Also there is the "Sometimes it quicker to walk map"